E. F. Johnson Company Catalog. VHF Mini-Scan Service Manual 1974. Material: paper. Size: 8 1/2" x 11". Description: white cover; black and white photograph of VHF Monitor Receiver; white and black print: "Service Manual, Johnson VHF Mini-Scan, Monitor Receiver, 1st Printing, Covers A Models, October 1974"; 18 pages.